Cross-Body Unusual Surface
Flapper is a Cross-body Sole kick.
Demonstration of a Flapper Kick.
Demonstration of a Double Flapper Kick.
Demonstration of a Flappers.
Bring the kicking leg across your body so the sole can meet the footbag from the opposite side.
Turn your foot so the sole faces the footbag and make clean, controlled contact with the bottom of your shoe.
Use a smooth cross-body kick rather than swinging too hard, keeping the footbag close and playable.